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ANDROID: ARM: fault: assume no context when IRQs are disabled during data abort.

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Bail out early if IRQs are disabled in do_page_fault or else
  [14415.157266] BUG: sleeping function called from invalid context at arch/arm/mm/fault.c:301

Russell King's idea from
  http://comments.gmane.org/gmane.linux.ports.arm.omap/59256

Signed-off-by: JP Abgrall <jpa@google.com>
This commit is contained in:
JP Abgrall
2013-04-29 16:07:00 -07:00
committed by Dmitry Shmidt
parent 813f267533
commit f556868afe
1 changed files with 2 additions and 2 deletions
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4
arch/arm/mm/fault.c
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@@ -273,10 +273,10 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
local_irq_enable();
/*
* If we're in an interrupt or have no user
* If we're in an interrupt, or have no irqs, or have no user
* context, we must not take the fault..
*/
if (faulthandler_disabled() || !mm)
if (faulthandler_disabled() || irqs_disabled() || !mm)
goto no_context;
if (user_mode(regs))